The AD8001 has no information on input pin differential and common mode input capacitance. There is no open-loop gain/phase curve either.
We can't be sure if AD8001 is compatible or not since we need sufficient information about the photodiode. I am talking about Capacitance, Shunt Resistance, and Peak current. Photodiode bias is needed as well. Unless you give us that information, we could not say that AD80001 is the perfect fit for your application.
We do however have a tool that could help you in choosing the right TIA for your photodiode. Please use Photodiode Circuit Design Wizard.
I use your company Photodiode Circuit Design Wizard and found AD8099. The part appears to be what I need. But I have a question:
For a transimpedance amplifier, the junction capacitance of the photodiode is an important parameter. In my situation, I have two photodiodes in series (balanced configuration), with the junction between the two back biased diodes feeding the inverting amplifier input. In calculating the bandwidth and feedback capacitance, should I add the junction capacitance of both diodes because both are connected to the input?
Thank you very much for your help.
Hi Tu Chau,
I really apologize for missing your follow-up question.
Yes, the photodiodes are in parallel for balanced configuration and that makes it's effective capacitance to add up.
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